Ceiling lamp



FIG. 1 is a perspective view of a ceiling lamp showing my new design;

FIG. 2 is a bottom view thereof;

FIG. 3 is a top view thereof;

FIG. 4 is a front elevation view thereof;

FIG. 5 is a rear elevation view thereof;

FIG. 6 is a left side elevation view thereof;

FIG. 7 is a right side elevation view thereof; and,

FIG. 8 is a view of FIG. 6 in a retracted position. 

The ornamental design for a ceiling lamp, as shown and described. 